Hot-air furnace



D. A. SCOTT.

HOT AIRFURNACE.

APPLICATloN FILED DEC. 44, 1920.

Ez nel? ar D. A. SCOTT.

HOTAIR FURNACE.

APPLICATION FILED DEC. 4| 1920.'

1 ,417,775, Patented May 30, 1922.

2 SHEETS-SHEET' 2.

`cal section taken on the UNITED 'STATES DEWEYA. scO'rr, or BUFFALO, NEWYon-K.

Hor-Aria FURNAO'E.

Application filed December 4, 1920.

To @ZZ whom t 'may concern:

Be it known that l, Dnwnr A. Soorr, a citizen of the United States,residing in Buffalo, in the county of Erie. and State 4Of New York, haveinvented new and useful Improvements in Hot-Air Furnaces, of

.which the following is a specification.

This invention relates to a hot air furnace and has for its objects tosimplify the construction, increase the heating efficiency, improve thecapacity of distributing heat, and to provide reliable means forhumidifyingthe heated air.

In the accompanying drawings: `Figure 1 is a vertical section of afurnace embodying my improvements loo-king forwardly or toward the fuelinlet. 2 is a horizontal Ysection taken on line 2`2, Fig. l. Figure 8 isa fragmentary side ele- .vation ofthe furnace. yFigure 4f is averticorrespondingly numberedline in Fig. 1. Figure 5 is a fragmentaryvertical section, on v an enI larged scale, of the means for directingthe heated and humidified kair in one .of the supplemental air heatingpipes either to the main outlet outside of the main air heating chamberor into the latter.

Similar characters of reference refer to like parts throughout theseveral views.

, 1() represents the combustion chamber or dome ofa hot air furnace, 11the fire pot arranged at the'lower end of the combustion chamber andhaving` a grate l2 in its of the fire pot hav- `ing a door 1.4-, 15 theash pit arranged bclow bottom, 13 the fuel inlet the .fire pot andhaving ani ash outlet door.16, and 17 the smoke pipe leadingfrom the topofthe combustion chamber to the chimney.

18 represents the 'Vertical main air heating` chamber which surroundsthe co1nbustion chamber, lire pot and ash pitand which may be suppliedwith fresh air inA any suitable` manner, for instance by air :inlets l),2() on oppositesides ofits lower end, the

`.inlet 19 in this instance being connected by a pipe 21 withanvoverhead room from the door y22 from which the air is withdrawn whilethe other inlet 2O opens into the base-- ment and draws air therefromThe ad mission of air from these two sources may `Specification ofLetters Patent.

p the compartment overhead Figure `thercofand is adapted to Patented May30, 1922. Serial No. 428,188.

be regulated in any suitable manner,` for instance by dampers or valves23, 24 ar ranged in the pipe 21 and the inlet 20, respectively, as shownin Fig. 1. The heated air may be `delivered from the main air heatingchamber and in any suitable manner tothe place where the same isrequired, this beingdone for exam-ple, vas shown in Figs. 1 and 1, by anoutletpipo 25 leading from, the `top kofthe main air heating chamberthrough the floor 22 of so as to heat the same directly.

Extending horizontally through the com` bustion chamber and the main airheating chamber area plurality of supplemental air heating pipes orconduits 26 which are preferably arranged in two tiers or rows one abovethe other, and staggered relatively to each other. sothat .the heat.rising from the burning fuel inthe fire pot will strike thesesupplemental air `'pipes ,most'efectively and heat the air passing'throughithc same. VThis .air is admitted to each of the supplemental airheating pipes through an inlet 27 at one cndthereof and may bedischarged ,either through a main air outlet 28 at its opposite end orthis air may be discharged through an auxiliary air outle 29. VTheinlets and main youtlets of the several supplemental air heating pipesare arranged outside ofthe main` air 4heating chamber, but the auxiliaryair Outlet of each supplemental pipe is arranged at the top place thispipe in communication with the main air Lheating chamber. `'lheinletsof-the supplemental air heating pipes open into a manifold 30 andtheadmission ,of air from any suitable source may be regulated by a`damper 31, as shown, or by equivalent means. The outlet of eachsupplemental heating pipe connects with a delivery pipe 32 leading ltoany `desired compartment of the building in which the furnace isinstalled, for instance, as shown in Fig. 1, of the` drawings, the nsameleads to ,an overhead room.

A valve device is provided for veachsupplemental air heating pipewherebythe air heated therein may be Vdirected either to its main outletor to its auxiliary outlet. "In its preferred form 4this valve devicey`comlio opening 39 in V35 engages the `trols the auxiliary air prises avertically swinging gate valve 33 which is pivoted on the upper side ofthe respective supplemental air pipe adjacent to the outer edge of theauxiliary air outlet thereof. By this means the gate valve may be raisedinto a horizontal position, as shown in full lines in Figs. 1 and 5,whereby the auxiliary air outlet of the supplemental air pipe is closedand its main outlet is opened, while upon lowering this valve into avertical position the main outlet of this pipe is closed and theauxiliary outlet thereof is opened. lJVhen the main outlet of asupplemental pipe is opened the heated air is carried therefromindirectly by one of the delivery pipes to the respective compartmentbut when the auxiliary outlet thereof is opened the heated air therefromis directed into the main air heating chamber and carried from theoutlet of the latter to the compartment dii'ectly overhead. f

Various means may be provided for operating each of the gate valves fromthe exteriorof the furnace, the means shown being preferred andcomprising a chain 34 connected with its inner end to the free edge ofthe valve gate and provided at its outer endfwith a ring 35 adapted toengage a hook 36 on'the exterior of the wall 37 of the main air heatingchamber the intermediate part of this chain passing around a guidepulley 38 on top of the supplemental air pipe adjacent to t-he inneredge of the auxiliary air outlet thereof and through an the wall 37.ldlhen the ring hook 36 the valve 33 is raised and when disengagedtherefrom the valve drops by gravityV into its other position, as shownby dotted lines in Figs. l and 5.

In order to humidify the heated air a water tank 40 is provided which isarranged within the lower part of the main air heating chamber adjacentto the fire pot so as to be heated thereby. The top of the tank opensinto the main air heating chamber so that the vapors escape into thesame vand humidify the air therein preparatory to being delivered to therooms of the building. W'ater is supplied to the tank when the sainerequires replenishing through one or more filling spouts 41 leading tothe exterior of theVwa-ll 37. From the top of the water tank a pluralityof vapor conduits or-pipes 42`lead to the several supplementalair-heatingpipes, prefere bly to t-lie undersideof each of these pipesvertically in line with' so that water the auxiliary. air outletthereof, vapors areV 'supplied to the air therein in eitherfposition ofthe gate valve which conoutlet of the same. As a whole this hot airfurnace is very simple in construction and presents a large heatingsurface which insures a large out-putV of hot air and an economical useof fuel,

I claim as my invention:

1. A hot air furnace comprising a combustion chamber, an upright mainair heating chamber enclosing said combustion chamber and having an airinlet and an air outlet, a supplemental air heating pipe extendinghorizontally through said combustion chamber, and vhaving an air inletand a main air outlet outside of said main air heat-iiig chamber andalso having an auxiliary air outlet whereby said supplemental pipe maybe placedin communication with said main air heating chamber, and amovable gate which in one position closes the main air outlet of saidsupplemental pipe and opens said auxiliary. air outlet and in anotherposition closes said auxiliary air outlet and opens said Ymain outlet oft-he supplemental pipe. y

2. A hot air furnace comprising a combustion chamber, an upright mainair heating chamber enclosing said combustion chamber and having an airinlet and an air outlet, a supplemental air heating pipe extendinghorizontally through said combustion chamber and having an air inlet anda main air outlet at its opposite ends outside of said main air heatingchamber and an auxiliary air outlet in its upper side between its endswhich isvadapted to place said supplemental air heating pipe incommunication with said main air heating chamber, and a verticallyswinging valve which in one position closes the main air outlet of saidsupplemental pipe and opens the auxiliary outlet thereof, and viceversa.

3. A. hot air furnace comprising a combustion chamber, an upright mainair heating chamber enclosing said combustion chamber and having an airinlet and an air outlet, a supplemental air heating pipe extendinghorizontally through said combustion chamber and' having an'air inletand a main air outlet at its opposite ends outside of said main airheating chamber and an auxiliary air outlet in the upper side betweenitsV ends which is adapted to place said supplemental air heating pipein comoutlet thereof, and vice versa, and means for operating said valvefrom the exterior of the furnace. v

et. A hot air furnace comprising a coin- Vbustion chamber, an uprightmain air heating chamber enclosing said combustion chamber and having anair inlet and an air outlet, a supplemental air heating pipe extendinghorizontally through said combustion chamber and having an air inlet anda main air outlet at its opposite ends outside of said main'airheatingchamber and an auxiliary air outlet in its upper side be- .saidsupplemental pipe and opens the auxillary outlet thereof, and viceVersa, a Water tank arranged in the lower part of said main air heatingchamber and opening into the latter, and a pipe extending from the topof l0 said water tank to the underside of said supplemental air heatingpipe vertically in line With said auxiliary air outlet thereof.

DEWEY A. SCOTT.

